Clamp



March 10,1931. A. .1. THMPsoN CLAMP I Filed June 22, 1929 INVENTOR1414/60 J Z710. P80

' ATTORNEYS Patented Mar. 1931 s arss ALLISON a. Ti-ioMPson,OF'OLEVELAND, onio CLAMP Application filed June 22 This inventionrelates to hanger means adapted for attachment to an I-beam for thepurpose of supporting therefrom an electric lamp or other fixture.

The object of this invention is to provide in such a hanger, means forfirmly engagingthe lower I-beam flange on its edges as well as on itsupper and lower faces whereby the Lbeamis firmly grasped regardless ofir- 19 regularities therein.

Further objects of the invention are to provide for such engagement invarious sizes .of I-beamshaving flanges of various dimen sions; and toprovide that the engagement of the flanges shall be all the more secureas V the supported weight is applied to the hanger.

The exact nature of the invention together with further objects andadvantages thereof will be apparent from the following descrip- 29 tiontaken in connection with the accompany ing drawings, in which Fig; 1is'an assembly view of an example'of my hanger means applied to anI-beam, the lower portion only m of the I-bea-m being shown, and this insection, and parts of the hanger means being also in section to showdetails of form thereof Fig. 2 is a perspective view of one of the clampmembers which forms a part of my invention; Fig. 3 is a vertical sectionas in the plane of line 33 Fig. 1, and Fig. 4 is a view correspondingwith the showing of Fig. 1 and indicating in comparison therewith l myhanger means applied to an I-beam having hea'vierflanges than asindicated in Fig. 1. With reference now. to the drawings, the principalparts of my hanger means are the clamp members 1, means for tighteningclamp members upon the I-beam flanges, such as the bolts 2, and whichtightening means may include a base member 3 designed for convenientconnection with the fixture to be supported.

The clamp members 1 are generally C- V shaped in side elevation eachhaving'an upper claw 4 and'a pair ofspaced lower claws 5. Each clampmember also has a depending tail portion 6 slotteda's indicated, at 7,to receive the tightening means.

Thus a clamp member applied as'indioi'the flange and the claws 5engaging the portions of both clamps and tending not only foretightening, by these lugs. 9 It will be apparent that when the assemblycated at the left hand Fig. 1, to the flange 8 1929. Serial No. 373,044.

otanJ Y-beam, and moved counterclockwise direction, .will engage theflange. at three points, the claw 4: engaging the upper-face y I Thetail 6 providesa leverage for so rotate I ingfthe clamp. 1 5 r In theassembly a pair of clamps are spaced oppositely on the edges of thelower I-beam lower face. 1

flange 8 as indicated, Fig. 1, so that a single-'60 bolt could extendbetween the tailportio-ns thereof and'thus serve to tighten the clampsupon the" I-beam, tightening of the bolt. Ob." viously, exertingleverage through the tail to rotate the clamps to cause their claws toengage the I-beam flange; but tending to move the clamps toward eachother so that the edges as wellas' the faces of'the flange are'engaged-I Conveniently, however, a base member 3. is arranged; between the tailportions of the. clamps extending as indicated between the lower claws 5ofeach clamp, and the pair of tightening bolts 2 associatedtherewith. Insuch case the member 3 may be generally of box shape, with open top andend portions 9 slotted as atlOto receivethe bolts 2. Thus the sideportions 11 v of the fmember strengthen the end portions thereof, andthe bolts 13 for securing the fixture to be supported with the basemember? li iyandthe bolts 2 are provided with washers 15 under theirnuts 16,,the washers, and;

hence the bolts, being'thus supported as he is made as in l tighteningof the nuts16 will tightenthe assembly securing theclamp members withthe I -beam flange and su porting the base member 3 thereby with equalsecurity. Also, by proper manipulation of I the nuts 16 the base member3-may be-a'djusted transversely. Thereafter, "as a loadis ap-- I pliedto the basev member 3 additional force willbe exerted upon the tailportions 6 of bottom'12, maybe apertured to receiveithe the clamp clawsto all the more firmly engage the I-beam flange.

Likewise, where the flange is large as in Fig. 4 the general arrangementof the parts will be Similar to the showing Fig. 1 except that thetightening bolts 2 will be angularly disposed. So also will the tailportions of the clamp members he angularly'disposed, so

that the base member 3 will be brought uptoengagement with the lowerface of the I-beam flange. Here, when the load is applied forces will betransmitted by the bolts 2 in the di rections in which they lie and thusmore directly to the flange than as in: Fi'g;x1.v

WVhat I claim is: 1. A clamp member for the purpose described, generallyof C -shape with upper and lower claw portions for engagingoppositefaces of an I-beam flange, said lower'claw" portion being split toprovide a pair of spaced claws, whereby said flange will beengaged atthree points, and said member having a depending tail portion split toprovide a clown- ,wardly opening slot to receive a securing boltextending between said lower claws.

2. A clamp member for the purpose described, generally of C-shape withupper and lower claw portions for engaging opposite faces of an I-beamflange, said lower claw portion being split to provide a pair'of spacedclaws, whereby saidflange willbe engaged at three points, and-saidmember having adepending tail portion split to provide'a downwardlyopening slot to'receive a securing-bolt extending between said lowerclaws sa id tail portion having an outstanding lug adapted to engage thehead portion of saidbolt to maintain said bolt in its describedassociation' with said clamp member;

3. Hanger means of the class described comprising a pair of C-shapedclamp members adapted to engage opposite flanges of'arr I-beam, a basemember adapted for disposition between said clamp members to support afixture from'said I-beam, each of said clamp members having abolt-receiving opening and said base member having a corresponding pairof openings, and a pair of bolts each securing one of said clampmembers'with the corresponding end of said basemember.

4:.- Hanger means of the class described comprising a pair of C-shapedclamp members adapted to engage opposite flanges of an I-beam, a basemember adapted". for disposition between saidlclamp'membersito support afixture from said I-beam, each ofsaid' clamp members having abolt-receiving opening and said base member having a corre* spondingopening, and bolt means extending. through said openings to secure" theclamp members on their flanges.

In testimony whereof I hereby affix my signature;

ALLISON J. THOM SON:

